985665 has 16 divisors (see below), whose sum is σ = 1646208. Its totient is φ = 502656.

The previous prime is 985657. The next prime is 985667. The reversal of 985665 is 566589.

It is not a de Polignac number, because 985665 - 2³ = 985657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (985667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1084 + ... + 1773.

It is an arithmetic number, because the mean of its divisors is an integer number (102888).

2⁹⁸⁵⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

985665 is a deficient number, since it is larger than the sum of its proper divisors (660543).

985665 is a wasteful number, since it uses less digits than its factorization.

985665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888.

The product of its digits is 64800, while the sum is 39.

The square root of 985665 is about 992.8066276975. The cubic root of 985665 is about 99.5198650606.

The spelling of 985665 in words is "nine hundred eighty-five thousand, six hundred sixty-five".